You have lungs for breathing.Most fish have gills for breathing.Gills have thin tubes that carry blood.As water goes into a fish’s mouth it passes over the gills.The gills take oxygen out of the water.All animals must have oxygen to live.Blood in the gills picks up the oxygen and takes it everywhere in the fish’s body.A waste gas called carbon dioxide also goes out of the fish’s body through the gills.
The lungfish can breathe air.Most lungfishes rise to the water’s surface to breathe.Some get oxygen from the water.
Fish Senses